When did the fuel tank go from under the seat to under the tub?

As a safety issue, an electric pump and a pressurized rubber gas hose inside the cab would definitely scare me. Think about why the "firewall" is called that...

 

I'm very interested in moving my under-seat tank to the rear. All of the Boyink links are dead have they been moved?

Mark
1970 CJ-5 odd fire v6, sm420, dana 18, warn ovdrive, 4:88 lockers front and rear

 

Thank you!

 

And, 9 years later, I still haven't installed that 6 way switching valve

 

Someone custom made mine .It's a '75 so that's the place it was born to ride in. I am very thankful for the drain& the 18 Gallon capacity. I need them both.